IEC 61249-4-18:2013

IEC 61249-4-18 ®
Edition 1.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Materials for printed boards and other interconnecting structures –
Part 4-18: Sectional specification set for prepreg materials, unclad (for the
manufacture of multilayer boards) – High performance epoxide woven E-glass
prepreg of defined flammability (vertical burning test) for lead-free assembly

Matériaux pour circuits imprimés et autres structures d'interconnexion –
Partie 4-18: Série de spécifications intermédiaires pour matériaux préimprégnés,
non plaqués (pour la fabrication des cartes multicouches) – Tissu de verre
époxyde préimprégné de type E à haute performance, d'inflammabilité définie
(essai de combustion verticale), pour les assemblages sans plomb

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IEC 61249-4-18 ®
Edition 1.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Materials for printed boards and other interconnecting structures –

Part 4-18: Sectional specification set for prepreg materials, unclad (for the

manufacture of multilayer boards) – High performance epoxide woven E-glass

prepreg of defined flammability (vertical burning test) for lead-free assembly

Matériaux pour circuits imprimés et autres structures d'interconnexion –

Partie 4-18: Série de spécifications intermédiaires pour matériaux préimprégnés,

non plaqués (pour la fabrication des cartes multicouches) – Tissu de verre

époxyde préimprégné de type E à haute performance, d'inflammabilité définie

(essai de combustion verticale), pour les assemblages sans plomb

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX N
ICS 31.180 ISBN 978-2-8322-1168-7

– 2 – 61249-4-18 © IEC:2013
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Materials and construction . 6
3.1 General . 6
3.2 Reinforcement . 7
3.3 Resin system . 7
4 Properties . 7
4.1 Properties related to the appearance of the prepreg. 7
4.1.1 General . 7
4.1.2 Dewetted areas (fish eyes) . 7
4.1.3 Broken filaments . 7
4.1.4 Distortion . 7
4.1.5 Creases . 7
4.1.6 Edge conditions . 8
4.2 Properties related to B-stage prepreg . 8
4.2.1 General . 8
4.2.2 Resin content . 8
4.2.3 Treated weight . 8
4.2.4 Resin flow . 8
4.2.5 Scaled flow thickness . 9
4.2.6 Melting viscosity . 9
4.2.7 Gel time . 9
4.2.8 Volatile content . 9
4.3 Properties related to prepreg after curing . 9
4.3.1 Electric strength. 9
4.3.2 Flammability . 9
4.3.3 Relative permittivity and dissipation factor . 10
4.3.4 Cured thickness . 10
4.3.5 Glass transition temperature (T ) . 10
g
4.3.6 Decomposition temperature (T ) . 10
d
4.3.7 Time to delamination . 10
4.3.8 Z-axis expansion . 11
5 Delivery form . 11
5.1 General . 11
5.2 Rolls . 11
5.3 Sheets . 11
5.4 Cut panels . 11
6 Quality assurance . 11
6.1 Quality system . 11
6.2 Responsibility for inspection. 12
6.3 Qualification inspection . 12
6.4 Quality conformance inspection . 12
6.5 Certificate of conformance . 12
6.6 Safety data sheet . 12

61249-4-18 © IEC:2013 – 3 –
7 Packaging and marking . 12
8 Shelf life . 13
9 Ordering information . 13
Bibliography . 14

Table 1 – Flammability, vertical burning test . 10
Table 2 – Decomposition temperature requirements . 10
Table 3 – Time to delamination requirements . 11
Table 4 – Z-axis expansion requirements . 11

– 4 – 61249-4-18 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MATERIALS FOR PRINTED BOARDS
AND OTHER INTERCONNECTING STRUCTURES –

Part 4-18: Sectional specification set for prepreg materials,
unclad (for the manufacture of multilayer boards) –
High performance epoxide woven E-glass prepreg of defined
flammability (vertical burning test) for lead-free assembly

FOREWORD
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